. If 10^2y =25 then 10^-y equals
If 102y=25, then 10-y equals:
A:- 1/5
B:1 /625
C:1/ 50
D:1/ 25
E:1/ 5
Best Answer
Explanation:
Given
102y=25
This can be written as,
(10y) 2=52
Hence,
10y =5
10-y =5-1
We get,
10-y =1/5
Final Answer:
Hence, the correct option is (e) i.e. 1/5
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